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How do I solve this problem?

According to the following reaction, how many grams of mercury(II) oxide are
needed to form 22.4 grams of oxygen gas?

mercury(II) oxide (s) mercury (l) + oxygen (g)grams mercury(II) oxide

  • Chemistry -

    Balance the equation first.

    Then, change the 22.4 g O2 to moles.

    Look at the coefficents in the balanced equation. That tells you how much mass of mercury(II)oxide is needed. I will be happy to critique your work, if needed.

  • Chemistry -

    Thanks... I don't understand, but I'm actually trying to help my daughter...hope this helps her... I have a couple more questions that I'm going to post.

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